Mango and Lime Cheesecake

I'm not big into making cakes but I was given 6 mangoes (into a bar) by one of my students and,feeling catholic, took them but felt guilty and then decided to assuage my guilt by using them for a cheesecake which the class could eat for the final lesson. Good, not too sweet because of the lime juice. Recipe written down from somewhere a long time ago:

Crust:
250gm digestive biscuits (Granita)
1.5 tbs caster sugar
110gm butter
Crush biscuits and mix in with butter and sugar and line the base of a flan tin (with the springy side) with it.

Filling:
2 Mangoes chopped up real good
Juice of one lime
4tbs sugar
Refrigerate this for about half an hour, drain off some liquid, heat a little so 3tsp of gelatine can dissolve in it. Return to the mango mix.

Beat 350gm of cream cheese, stir in 175ml of sour cream and 1tsp of vanilla essence and the fold in the mango mixture and refrigerate until firm.

Students liked it because the lime and sour cream kept it from being overly sweet.